Generating a time vector

How do i generate a time vector p2 that contains 𝑛 number of samples in the range from 0 to the time duration of the sound signal in sa2.wav. Here, 𝑛 is a fixed number dependent on the length (number of samples) of the auditory spectrogram.

Answer 1

[Star Strider]

Try this —

[y,Fs] = audioread('sa2.wav');
L = size(y,1);
p2 = linspace(0, L-1, L)/Fs;

.

[Xhi Pika]

Thank you

[Star Strider]

As always, my pleasure!

[Star Strider]

This seems to be a homework assignment (and I have no idea with ‘fig.3’ shows), and all that should have already been covered either in class or discussed in your textbook. The relevant MATLAB functions are probably fft, stft, pwelch, pspectrum, and spectrogram. (The units of the pspectrum function plot with the 'spectrogram' option are different from the units of the spectrogram plot.) Others may also be appropriate.

[Star Strider]

Ask your professor or teaching assistnat to clarify the assignment for you.

The stft function (introduced in R2019a) will likely be helpful as will the bandpower funciton.